High-Pressure Synthesis, Crystal Structure, and Properties of GdS2 with Thermodynamic Investigations in the Phase Diagram Gd-S,

  • Gadolinium disulfide was prepared by high-pressure synthesis at 8 GPa and 1173 K. It crystallizes in the monoclinic space group P121/a1 (No. 14) with lattice parameters a = 7.879(1) Å; b = 3.936(1) Å, c = 7.926(1) Å and β = 90.08(1)°. The crystal structure is a twofold superstructure of the aristotype ZrSSi and consists of puckered cationic [GdS]+ double slabs that are sandwiched by planar sulfur sheets containing S22– dumbbells. The thermal decomposition of GdS2 proceeds via the sulfur-deficient polysulfides GdS1.9, GdS1.85 and GdS1.77 and eventually results in the sesquisulfide Gd2S3. GdS2 is a paramagnetic semiconductor which orders antiferromagnetically at TN = 7.7(1) K. A metamagnetic transition is observed in the magnetically ordered state.

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Metadaten
Author: Carola J. Müller, Ulrich Schwarz, Peer SchmidtORCiD, Walter Schnelle, Thomas DoertORCiD
URL:http://onlinelibrary.wiley.com/doi/10.1002/zaac.201000015/full
DOI:https://doi.org/10.1002/zaac.201000015
ISSN:1521-3749
Title of the source (English):Zeitschrift für anorganische und allgemeine Chemie
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2010
Tag:Gadolinium; High-pressure synthesis; Phase diagrams; Polysulfides; X-ray diffraction
Volume/Year:636
Issue number:6
First Page:947
Last Page:953
Faculty/Chair:Fakultät 2 Umwelt und Naturwissenschaften / FG Anorganische Chemie
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